Editing Luca Pacioli (section)

===Translation of Piero della Francesca's work===
The majority of the second volume of {{lang|la|Summa de arithmetica, geometria. Proportioni et proportionalita}} was a slightly rewritten version of one of [[Piero della Francesca]]'s works. The third volume of Pacioli's ''Divina proportione'' was an Italian translation of [[Piero della Francesca]]'s Latin book ''[[De quinque corporibus regularibus]]''. In neither case did Pacioli include an attribution to Piero. He was severely criticized for this and accused of plagiarism by sixteenth-century art historian and biographer [[Giorgio Vasari]]. R. Emmett Taylor (1889–1956) said that Pacioli may have had nothing to do with the translated volume ''Divina proportione'', and that it may just have been appended to his work. However, no such defense can be presented concerning the inclusion of Piero della Francesca's material in Pacioli's Summa.